After the cutscene you have to drive and pick up Jethro.
When you get there, press L3 to make him get into the
car. Now drive to the hospital in Santa Flora. Park
in the red marker and wait. Now go talk to Dwayne, then
drive to the police station and park in the red marker.
Then drive to Zero's RC Shop and talk to Zero. Head
back to the garage and watch a cutscene.

2. DeconstructionUnlock: Driving School, Triad MissionsReward: -

Watch the cutscene. Walk up to the constuction yard
and get into the Dozer. Now run over all the portable
barracks, be careful with the ones that has gas tanks
that will blow up if you hit over them. When all the
portables are destroyed, run over the toilet with the
foreman in it and push it down the hole behind it. Get
out of the Dozer and into the Cement Truck. Back up
the truck in the red marker and a cutscene will start.

Note!
You have to complete the Casino mission A
Home in the Hills to unlock the next missions.

3. Vertical BirdUnlock: Hydra JetReward: $50.000

After the cutscenes you end up standing by a boat.
Get on the boat and get to the military ship at the
naval base. When you reach the back of the ship, stop
the boat before you go round the corner, get out and
swim inside the back of the ship or you will alert the
guards. Sneak up the ramp and wait for the guards to
walk away. Climp the boxes to the right of the room
and watch out for the service worked in the forklift.
If he spots you he will start the alarm. Go up the stairs
straight ahead and into the next room. There is a service
worker in the left room. And a guard will come in front
of you. If you can, stealthkill them but if the alarm
goes off it really doesnt matter since there arent very
many guards anyway. Get inside the control room and
shut down the SAM sites. Now get over to the Hydra Jets.
Destroy the one parked outside by the edge of the ship,
and the one inside. This will help you when you take
off since there will only be one plane chasing you instead
of three. Now get inside the jet parked on the platform
and take off. Take out the jet chasing you. Target by
holding the R1 button until the target locks on and
gets red, then fire with L1. Now fly to the yellow dots
on your map and destroy the spy ships. When they are
all destroyed, fly to the abandoned airfield and land
the plane. Park it inside the hangar to complete the
mission. The Hydra will now show up inside this hangar
in the future.

4. Home ComingUnlock: More Sweet MissionsReward: Respect +

Drive to the dot on your map to pick up Sweet. After
the cutscene, head over to the red dots on your map
and kill all the drug dealers. Now provoke a gang war
with the Ballas by killing 3-4 of them. Win the gang
war and take over the Grove again to complete the mission.

5. Cut Throat BusinessUnlock: -Reward: Respect +

Get into the car with Madd Dogg. Drive to the dot on
your map where OG Loc is shooting av ideo. OG will take
of in a hovercraft! Get into the other hovercraft and
chase him. You cant kill him so just try to keep up
with him. After a while you end up on the pier where
OG get into a go-cart. Get into the other go-kart and
keep following him. When you reach his studio a cutscene
will start and the mission is complete.

Note!
You have to complete the Sweet mission Grove
4 Life to unlock the next mission. Also,
before you start the Riot
mission try to take over at least 35% of the Los Santos
territories since it will he a lot harder once the riot
has started.

6. RiotUnlock: Final Sweet Mission End
of the LineReward: Respect +

Get into a car and drive back to the Grove and enter
the red marker to complete the mission. A riot has started
all over the city so it wont be as easy as before to
drive in the streets.